This rustic potpie features a top crust of tender drop biscuits that cook right in the slow cooker. The steam heat produces a soft and tender biscuit topping. If you prefer a drier texture to the biscuits, let the cooked potpie sit uncovered for about 10 minutes before serving. To make this gluten-free, use diced tempeh or extra-firm tofu instead of seitan and use a gluten-free flour blend. For soy-free, omit the soy sauce and use a soy-free sauce (purchased or